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How to convert Centimeters Per Hour to Millimeters Per Second (cm/h to mm/s)? 1 cm/h = 0.00277778 mm/s. 1 x 0.00277778 mm/s = 0.00277778 Millimeters Per Second. Always check the results; rounding errors may occur.
Definition: In relation to the base unit of [speed] => (meters per second), 1 Centimeters Per Hour (cm/h) is equal to 2.77778E-6 meters-per-second, while 1 Millimeters Per Second (mm/s) = 0.001 meters-per-second.